Wednesday, August 10, 2011

Image via WikipediaLC has announced that new vocabulary data has been added to the LC Authorities and Vocabularies Service.

The Library of Congress is pleased to make available additional vocabularies from its Authorities and Vocabularies web service (ID.LOC.GOV), which provides access to Library of Congress standards and vocabularies as Linked Data. The new dataset is:

Library of Congress Name Authority File (LC/NAF)

In addition, the service has been enhanced to provide separate access to the following datasets which have been a part of the LCSH dataset access:

Library of Congress Genre/Form Terms

Library of Congress Children's Headings

The LC/NAF data are published in RDF using the MADS/RDF and SKOS/RDF vocabularies, as are the other datasets. Individual concepts are accessible at the ID.LOC.GOV web service via a web browser interface or programmatically via content-negotiation. The vocabulary data are available for bulk download in MADS and SKOS RDF (the Name file and main LCSH file will be available by Friday, August 12).

The Library of Congress is making its controlled vocabularies and classification system freely accessible on the Web. This presentation describes our services related to two of those controlled vocabularies and classification schemes: the Library of Congress Subject Headings and Library of Congress Classification. It also describes the work to link various language versions of LCSH together.

The initial structure for this service uses SKOS, Simple Knowledge Organization System, which “Provides a model for expressing the basic structure and content of concept schemes such as thesauri, classification schemes, subject heading lists, taxonomies, folksonomies, and other similar types of controlled vocabulary.

This Technical Bulletin covers all of the Library of Congress’s MARC 21 Bibliographic, Authority, and Holdings Formats Update No. 12, dated October 2010, elements from other recent MARC 21 Updates whose implementations had been postponed, code list additions and changes published chiefly since May 2010, and other suggestions from WorldCat users and OCLC staff. Many of these elements, including those from MARC 21 Update No. 12, are related to Resource Description and Access (RDA).